Apparatus for placing beads on tire carcasses



Fe'b. 5, 1946. c. s. MccHEsNl-:Y

VAPPARATUS FOR lPLACING BEADS ON TIRE CARCASSES Original Filed Oct. 3, 1942 4 Sheets-Sheet 1 Mk RN Nw j.

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APPARATUS FOR PLACING BADS ON TIRE CARCASSES original iled oct. s, 1942. 4 sheets-sheet 2'- ag Tlv-'. 11312 M1." il* 1. w1 O 1 l k )MM U11 T l1 MF 1 1 1 X ff/M l 1 1 w 1. w 1* f l 1 E E 1 *l 1 I g 11 I M l L==J' M nNvE N-roR Cw/LER 5, Mc: CHESNEK Feb. 5, 1946.

c. s. MccHl-:sNEY 2,394,465

APPARATUS FOR PLACING BEADS 0N TIRE CARCASSES Original Filed Oct. 3, 1942 4 Sheets-Sheet 3 vINVENTQR. l Cun. ER .5.' /Wci (HES/Vfl.

A TTO R/VEV Feb. 5, 1946. I c; s, MccHEsNEY l 2,394,465

APPARATUS FOR PLACING BEADS ON TIRE C ARCASSES l y Original Fledot. 5,1942 4'Shee'cs-Sheet 4 Patented Feb. 5, 1946 APPARATUS FOR PLACING BEADS N TIRE CARCASSES Cuyler S. McChesney, Kenmore, N. Y., assignor to Dunlop Tire and Rubber Corporation, Buffalo, N. Y., a corporation of New York Original application October 3, 1942, Serial No. 460,705. Divided and this application November 18, 1944, Serial No. 564,163

2 Claims. v (Cl. 154-9) This application is a division of my co-pending application Serial No. 460,705, filed October 3, 1942, for a Tire building machine.

In the machine of my co-pending application the various tire elements, such as the plies, the

bead wires, chafer and breaker strips and tread are all applied in proper succession onto a rotating drum and there united into a tire carcass which is later formed and molded in a vulcanising apparatus.

In the machine of my co-pending application the rotating forming drum is mounted on a rotating shaft projecting from a housing which contains a motor for rotating the drum and means for controlling the application of the various tire elements.

In the invention of my present application means are provided for applying the beads to plies on the drum during the building of the carcass and for centering the beads accurately on that portion of the plies that are turned over the ends of the drum. Inasmuch as the completed tire carcass must be removed endwise from the drum the bead placing mechanism must be swung out of alignment so as not to interfere with the removal of the completed carcass.

In my present invention one of the bead placing means is mounted concentrically on the shaft supporting the drum so that a bead may be placed in position thereon before beginning the building of the tire and While the drum is collapsed. The opposite bead is placed on a holding means spaced from the opposite end of the drum and mounted in such a way that it may be swung to one side during the removal of a completed tire carcass and thereafter swung back into alignment with the drum during or prior to the application of the tire elements thereto.

The various features of my invention are illusl of Fig. 1;

Fig. 3 is a front elevation on a larger scale than that of Fig. 1 showing plies of rubberized fabric applied to the drum in position to receive the beads;

Fig. 4 is a plan View of the mechanism shown inFig.3;

Fig. 3 showing the drum and one of the bead applying means;

Fig. 6 is a detail of means for swinging one of the bead placing members taken on line'B-B of Fig. 2.

In the embodiment of the invention shown in the accompanying drawings a forming drum I0 having flat end surfaces and I2 is .supported on a shaft I3 projecting from a housing |4'in which 'the shaft is mounted on suitable bearings such as I5. The shaft I3 may be driven forwardly or reversely by means of a motor IB'having a pulley which is connected by a belt I8` to a' pulley I9 mounted on a part l2l) of the shaft I3 within the housing I4. The housing I4 is preferably mounted on a base 2| which projects to one side of the housing and on which are mounted upright supports 22, 23, 24, and 26 for supporting various actuating mechanisms of the bead placing device.

The apparatus in the accompanying drawings is illustrated in the formation of a four-ply tire but it will be understood that it may be applied to the building of tires of any desired number of plies.

After two plies 21 have been applied to the forming drum and stitched together they form a cylinder with the kends of the plies projecting beyond the edges ofthe drum. The projecting ends of the plies are then ,turned inwardly flat against the face of the drum, as indicated at 28 and 29, Fig. 3, in position to receive the bead Wires or beads. Y

The beads are mounted on bead rings 30 and 3|, Figs. 1, 3 and 4. The bead rings 30 and 3| have annular flanges 32 and 33 respectively, projecting toward the drum I0 and each has a groove 34 at its outer peripheral edge or corner to receive its respective bead. The rings are supported on spidersV 35 and 36 which are in turn mounted on the upper ends of supporting brackets 31 and 38. Each of these brackets is slidably mounted on supporting rails or'shafts whereby they may be moved toward and from the ends and '|2 of the .drum Ill. Y

YThe bracket 38 is in xed position relative' to the axis of the drum I0 so as to hold the flange 33 and groove 34 centered co-axially with the drum. The lower part of the bracket 38 is widened to an integral base 39 through which pass supporting rods or shafts 40 and 4|. For convenience these rods may be positioned slightly Vback of the vertical plane of the axis of the drum |0`and are preferably in a horizontal plane.

Fig. 5 is an end view taken from the left of 55 .The rod 40. which is hollow, is supported on ated by a pneumatically or hydraulically operated fm piston and cylinder 42 to which-theabr-acket Vi3!! connected by a sliding piston rod 43, Figs. j=1, .`2

and 6.

The bead ring 3| issuppliedlwithfa beadbe'fore ytheplies of fabric are wrapped'on the fdrum1an while the drum is collapsed.

When the bead is to be `applied *tof-the drum;

over clockwise until projection 48 rests on the flat surface 49 whereupon Vthe base 41 may slide lengthwise of the shafts 4| and 50 to bring the bead ring tightly against the end of the drumi. For'this purpose the base Aor carriage 46 is secured 5to a piston :s'tfem 51, 'Figs."1`4, which extends *through the "Wall of the'-h'ousing |"4 Pand into a cylinder 58 mounted immediately beneath the 'cylinder 42. Y n

.The -end ofthe piston rod 51 in the cylinder 58 .isrprovided with a piston similar to that of piston rod 43 so that when pressure fluid is admitted to thelet'e'ffcylinder58 the bead ring will be moved s intol'ngagemerit wvith the drum Ii), and when fluid is admitted through anielectromagnetic-.valve Y 44, Fig. 2, to the right of the cylinder 42 to'driye the piston and piston rod 43 to the left andbring thebead ring 3| tightly against the en'd of the drum `|11 andathemreversely, tothe leftiendfof :the cylinder to move the arm 38 awayfromtheA drum.

The arm ;3';1.is pivotallysupported so that itimay rswingginto co-axial positionrelativeto the rvdrum l and of co-axial position a sufficient distance toV permita completedrcarcass .or tire to be .removed longitudinally from dzhe -drum when :the latter (is `collapsed. For this purpose the Aarm v31 is keyed `atfits 'lower .end on .ashaft `4.5, Fig. A6, which is pivtotally .supported at its ends .betweena pair of ears 46 extending upwardly. from a Vbasev41. To positionthe arm 31 with the vring 32 centered .accueratel-y on 'the axis vof the drum l0 the lower part of the arm 31 is provided with ,a vside'extension 148 which, as shown Vin Fig. 6, .restslona at support V49of1the base 41 when the arm is moved -to fcoaxial position. Y :f l

The ibase 41 isjslidably supported on .the lrod or shaft 4| land a parallel shaft50, Figs. .1, 4 and 5, which is supported between the standard 2-2 and .therstandard 24. The arm 31 is rocked to and .from :its o o-axial 'position I,by means of Va pinion v| keyed'on the rock shaft 45 Aand made fast -to .'thear-m 31 .and meshing with .a gear or yhalf gear 52 slidably mounted on the shaft K4| with asliding Vkey to permitthe base 41 and arm 31 to slide 1on- .gitudinally of the shaft. To VixV and secure 4the gears-5| `and 52 inproperengagement 0r mesh the 'lower-[end Aofthe arm 31 is `bi'fgurcated to receive [the v`gear 5| Aand lthe sliding .base 46 isfbifurcat'ed to .receive vthegear'52.V

i When .albead Ais to 4be applied to the=assenibled plies onthe drum it may be mounted in the groove 34 of the bead ring 32 while the latter is tiltedout of alignment lwith the axis ofV the drum `|0.

. To apply it to the tirestructure built up onthe drum thes'haft '4| is.rocked`to swing .the arm .'forwardly or clockwise, .as viewed in Fig. f6, until'the ,projection '48 rests upon the flat support `49 o'f the ,base V|16 and is thus'in alignment or co-.axial with the drum 10. Y v

The shaft-,4| isrockedbymeans of apneum'atic or hydraulically operated piston and cylinder 53,V

fFigs. 2 and 5, pivotally mounted at ione endon ,a

'supporting rib 54 of vthehousing |'4 .and recipropressurefiuidis admitted to the opposite end of v=theicylinder 518f.the bead ring will be pushed away :frometheidnum =|:=|Z|ia1o1d then may be tilted to one o When a tire carcass is to be built the respective beads are mounted on the bead rings and 3| -an'dinfthe flanges andr33-respectively thereof. .The :beads are igenerally covered with .a .strip =.of

f vunvulcanized rubber 'ff-abrio andare, therefore,

suiiiciently stack-y .to adherefsecurely to t'he :bead rings. Whenfthey are ato beraplled :to ithe tire fabrics :the rings :are :moved by their irespectiue ypneurnatically :operatedgpistons Ito `prime-'the bead rings and zbeads against the-tire `:tabricthatl-has .beenturned iover the end faceszof theidrfums-and press the beads tightly against this .fabrio; i l :',Lhe fabric ,fis fof unvulcanizedl rubber zfand, therefore, -has a .tacky surface to which the beadsiadhere morermly than they .dotoithefbead rings. i When the :bead rings :are 1Withdrawn from the -end Lfaoes `of the Idrum, therefore, =th e beadsane .left const-he drum accurately centered thereon and :held'fse- :curely by the adhesion of thetacky surf-aces of .thetire fabric l'and .of the bea'dfszj Then the ,-part nef the tire :fabricfprojecting inwardly :beyond the 401be'ads :toward the xcenter the: MJdrum rmaybe Y-to and :from lsaid drum :fand to pressi-said loe'adVV Aagainstwthe .end :face fof Ysaid sdram, a :pinion fsecured Y.to said :rock :and concentricfyvithfits .axis -of rotation, Va gear fineshing `with rsaid'qainion, .a-crank actuating :sa-id gearg :means torocksaid crank .-arm, and stops lto `limit ithe :rocking -fofsaid .arm to and item icoaxial position :relative-tp said A2. Apparatus forfapplyingfagbeadtortireaoric v `on the yend ,face of a :forming drum .aw-hichfcomprises a bead carrying elementhaving means to position .a `bead .-in concentric frelation to4 the fend face A-of .said .drum, azrock Y-a-rm supporting 1:said element, meansftog slide fsaid .rock arm and .e'lement to. and .from 1said Idrum and to ,press :fsaid bead .against `the end V'face .of saiddrum, apinion secured to said rock arm andfconcentric with 1.its .axis of .rotaton,.a gear meshing withsaid pinion, .a .crank v`actuating said gear, :Fluid gpressure means to .rock -said crank g arm, and stops `fte .-limitfdihe rocking of said arm to and from coaxial position .relative .tosaid drum.r

CUYLER s; 

